Stellar Astrophysics

summer term 2018
Lecturer: Stefan Jordan and Ralf Klessen
Link zum LSF
18 participants


Ralf Klessen

ZAH/ITA, Albert-Ueberle-Str. 2, 69120 Heidelberg

Stefan Jordan

ZAH/ARI, Mönchhofstr. 12-14, 69120 Heidelberg



Kleiner Hörsaal, Philsophenweg 12


Lecture: 14:15-16:00

Tutorial: 16:00-17:30



Stellar structure and evolution / stellar atmospheres / Sun


19.4.18: Introduction (Ralf Klessen)

26.4.18: Stellar structure 1 (Ralf Klessen)

03.5.18: Stellar structure 2 (Ralf Klessen)

10.5.18: Himmelfahrt

17.5.18: Stellar structure 3 (Ralf Klessen)

24.5.18: Energy transport (Ralf Klessen)

31.5.18: Fronleichnam 

07.6.18: Energy production (Ralf Klessen)

14.6.18: Main sequence (Stefan Jordan)

21.6.18: Stellar evolution to the AGB (Stefan Jordan)

28.6.18: Late stages of stellar evolution  (Stefan Jordan), Gleichzeitig SFB-Evaluation!

05.7.18: Stellar pulsations, rotation, magnetic fields  (Stefan Jordan)

12.7.18: Stellar atmospheres stellar spectra  (Stefan Jordan)

19.7.18: Stellar spectra  (Stefan Jordan)

26.7.18: WRITTEN EXAM (Ralf Klessen)



The written exam starts at 14:15 CEST in the Kleiner Hörsaal.



• Please use only the paper that was handed to you. You get additional blank sheets of paper if needed.


• Please write your name on every sheet of paper.


• No other tools, with the exception of writing utensils are admitted.


• Please give back the sheet with the exam problems and all pages on which you have written something.


Hints: If calculations are performed, orders of magnitudes are fully sufficient. The use of pocket calculators or smart phones is not permitted.


It is a good idea to start with those problems that you can easily solve. No lengthy explanations are necessary. Short but clear answers are sufficient.




The seminar will take place on Monday and Tuesday, July 30 and 31, 2018. Possible seminar topics (review papers) can be found at this ADS list. You can also suggest own topics. Please discuss that with the lecturers.


Distribution of seminar topics (preliminary! Not fixed yet!)

July 30 

1. Manuel Bayer (9:00-9:45): High-Mass Star and Massive Cluster Formation in the Milky Way

2. Maria Selina Nitschai (9:45-10:30): Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters

3. Nico Winkel (11:30-12:15): Stellar Multiplicity

4. Hannes Riechert (14:15-15:00): Physical Processes in Magnetically Driven Flares

5. Thomas Pfeil (15:15-16:00): Asteroseismology of Solar-Type and Red-Giant Stars

6. Tunde Aluko (16:00-16:45): Gaia Data Release 2: The first Gaia catalog of Long Period Variable candidates

July 31 (times TBD)

7. Lukas Eisert: Gaia Data Release 2: Observational Hertzsprung-Russel diagrams

8. Nicolas Hernandez: Solar Dynamo Theory


9. Max Häberle): Gaia Data Release 2: Variable stars in the colour-absolute magnitude Diagram

10. Valeriy Semenov: RR Lyrae stars as standard candles in the Gaia Data Release 2 Era

11. Erekle Arshilava: Masses, Radii, and the Equation of State of Neutron Stars

12. Christian Matthé: Magnetars

13. Rebekka Schupp: Progenitors of Core-Collapse Supernovae

14. Marie-Luise Steinmeyer: Nucleosynthesis in Stars and the Chemical Enrichment of Galaxies 

15. Uddipta Bhardwaj:  Pre-Supernovae Evolution of Massive single and Binary Stars


Exercise sheets

Practice groups

  • Group Tutorial (Jordan, Klessen)
    18 participants
    Philos.-weg 12 / kHS, Thu 16:00 - 17:30
  • Group Lecture (Jordan, Klessen)
    0 participants
    Philos.-weg 12 / kHS, Thu 14:15 - 16:00
Stellar Astrophysics
summer term 2018
Jordan Klessen, Ralf Klessen
Link zum LSF
18 participants